Improvement in devices for balancing sashes



S. S. FARGO.

Improvement in Devices for Balancing Sashes.

NO. 131,055. Patented Sep.3,1872.

UNITED STATES PATENT OFFICE.

SAMUEL S. FARGO, OF BRISTOL, CONNECTICUT.

IMPROVEMENT IN DEVICES FOR BALANCIN'G SASHES.

Specification forming part of Letters Patent No. 131,655, datedSeptember 3, 1872..

Specifications describing certain Improvements in Sash-Cord Pulleys,invented by SAM- UEL S. FARGO, of Bristol, county of Hartford and Stateof Connecticut..

My invention consists of the peculiar construction and arrangement ofthe rollers within the frame, all as hereafter described.

In the accompanying drawing, Figure 1 is a plan view of a sash-cordpulley and its frame which embodies my invention. Fig. 2 is a verticaland longitudinal -section of the same on line .mv of Fig. 1, and Fig. 3is a vertical and transverse section of the same lon line y y of Fig. 1.

A designates the pulley frame or shell, which is left open at the top,thereby forming a U- shaped shell, as shown in Fig. 3. B designates aninner frame, a transverse section of which is also of U-shaped form, butof less depth than the frame A, and it is hung Within the frame A bymeans of a pin, a. Transversely through the inner frame B are threeholes, in which I place straight cylindrical rollers b b b, the samebeing formed of short pieces of wire. The rollers b b b are inserted inthe frame B previous to hanging said frame in the shell A. y

I/Vhen the rollers and the inner frame B are secured Within the frame Athe sides of said frame prevent the rollers from slipping end- Wise outof place. The rollers are for the cord to pass over, the same as theordinary sashcord rollers; but by being smaller the friction is greater,and therefore to balance the sash it requires Weights equal to onlyone-half the Weight of the sash, instead of the same Weight. It is, ofcourse, evident that the number of rollers for each frame A may be moreor less without changing the nature of my invention.

By my invention I produce a pulley which is cheaply made, and in usesaves largely in sash-cord weights.

I claim as my invention- The combination of the cylindrical rollers b bb, inner frame B, and shell A, all substantially as and for the purposedescribed.

SAMUEL S. FARGO. Witnesses:

ELIAS BURWELL, DANL. I. GALE.

